The accident prevention measure and analysis based on internet of things in the gas explosion of coal mines

Abstract：The reasons for the 11·5 gas explosion disaster happened in Jiaojiazhai Coal Mine were analyzed in which 47 miners was killed.Firstly,due to the unreliability of the power system,the unexpected power failure happens quite often,and it leads to the ventilator stopping work and the gas density reaching the level which may cause the explosion;secondly,in the state of the gas-electricity being unlocking and without exhausting the accumulated gas first,recovering the power system and ventilation system all of sudden;thirdly,the electric spark produced in an explosion happened in the two-way terminal box of the power cable ignites the gas.The measures for preventing the similar accidents were also studied.They are：to accelerate the research and application of the internet of things in the coal mine;to strengthen the monitoring of the products permitted by the mine-use safety labels,it includes the production,transportation,storage,employment and maintenance of the products,etc.;with the support of the internet of things,to realize multi-level gas monitoring,the gas,power and ventilation locking in the coal mine;to realize multi-level monitoring of the power system and the ventilation system to ensure the finding of the hidden dangers in time and the reliability of the two systems.